APPLICATION OF THE CONNECTED-MOMENTS EXPANSION TO THE HALF-FILLED HUBBARD-MODEL

被引：7

作者：

LEE, KC

LO, CF

机构：

[1] Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories

来源：

NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA D-CONDENSED MATTER ATOMIC MOLECULAR AND CHEMICAL PHYSICS FLUIDS PLASMAS BIOPHYSICS | 1993年 / 15卷 / 12期

关键词：

GENERAL THEORY AND MODELS OF MAGNETIC ORDERING;

D O I：

10.1007/BF02451940

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper we have applied the method of connected-moments expansion to investigate the ground state of the half-filled Hubbard model for both the linear chain and the square lattice. The CMX series appear very unstable and give rather poor estimates of the ground-state energies. This seems to suggest that it does not provide a useful method for estimating ground-state energies of this model.

引用

页码：1483 / 1487

页数：5

共 19 条

[11]

Lee K. T., UNPUB

[12]

LEE KH, IN PRESS

[13] DENSITY OF STATES OF THE 2-DIMENSIONAL HUBBARD-MODEL ON A 4X4 LATTICE [J].